implement auth

src/types.d.ts

@@ -1,3 +1,12 @@
+export interface AuthPayload {
+  // An UUID string, unique per request.
+  token: string;
+
+  // Unix time in seconds. It is the time when the token was issued.
+  // Will expire after a time window.
+  issuedAt: number;
+}
+
 export interface Quote {
   id: number;
   text: string;